1) When the total ammonia concentration is controlled at 8mol/L, the liquid-solid ratio is 4:1, the leaching temperature is 40°C, and the leaching pH is about 10.0, the leaching rate of zinc in zinc oxide soot can reach 92.05%. 2) After purification and impurity removal in two stages, the mass concentration of impurity ions of Cd, Pb, As, Fe, Cu and Mg in the leachate is less than 0.1mg/L, indicating that the purification effect is better, which provides a clean preparation for zinc oxide. Zinc source. 3) The zinc ammonia purification solution is subjected to microwave evaporation for 25 min and baked at 400 °C for 120 min to obtain the target product zinc oxide. 4) After leaching by ammonia method - microwave evaporation of ammonia - pyrolysis treatment, spherical active zinc oxide having a purity of 96.52% and an average particle diameter of 3 & mu; m and a hexagonal crystal structure can be obtained, which can be widely used in the rubber industry. Achieve high value-added conversion of zinc-containing waste.